/**
 * CodeStandard
 * @author hjd
 * @date 2019.5.2
 */
public class CodeStandard {
    public static void main(String [] args){
        StringBuffer buffer = new StringBuffer();
        buffer.append('S');
        buffer.append("tringBuffer");
        System.out.println(buffer.charAt(1));
        System.out.println(buffer.capacity());
        System.out.println(buffer.indexOf("tring"));
        System.out.println("buffer = " + buffer.toString());
        int n =20;
        if(buffer.capacity()<n) {
            buffer.append("1234567");
        }
        for(int i=0; i<buffer.length();i++) {
            System.out.println(buffer.charAt(i));
        }
    }
}